Crossword Genius

Drums tied on top, I’m carrying water in Rajasthan (7)

Ross

I believe the answer is:

timpani

I'm a little stuck... Click here to teach me more about this clue!

'drums' is the definition.
(I've seen this before)

'tied on top i'm carrying water in rajasthan' is the wordplay.
I cannot really understand how this works, but
'i'm' could be 'im' and 'im' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for timpani that I've seen before include "Set of kettledrums" , "> kitchen equipment?" , "Mini tap on a large drum" , "Features of kitchen" , "orchestra members" .)

I've seen this clue in The Hindu.
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